There will be a negative effect to a negative action. That the moral physics. I don't care what kind of belief you're into.
Typically what goes around comes around is a grossly over used cleche. I know quite a few very bad guys who, if negative action were to occur to them, would just simply be swallowed up by the earth. Conversely I know some very great guys who have never caught a break for all of that wholesomeness. Infact some of them are still on the way down.
You should never worry about that kind of thing, usually its the thought of better or worse things happening in our minds that creates a self fulfilling destiny.
But some of us just didn't approve of him having fun at someone else's expense. And as for her being devistated, i think it'll be just another lesson for her, but it still creates a negative perception of men in general for her. Ugh...I'm not even going to go into that. Too cosmic and long winded.
Like I said if it wasn't him It'd be the next guy. No one can p*ssy foot through life without picking up a few bruises and cuts, scars build character. And he's not really having fun at her expence becuse the likely hood of them marrying (Which in my mind is the only time monogomy is the only way) are slim to none... bad preception of men, she probably already has one of those. She has friends they talk and its not like he's the only guy she sees.
So you have to hurt someone to have an adventure? You have to hurt someone to be alive?
Well no one has really gotten hurt yet, and lets say she does find out. By the sounds of things from Rex's story IF she were to decide to go anywhere, she'd have a whole new set of suiters to help dry her tears. I also think you underestimate the toughness of the human spirit. I've cheated/been cheated on before and honestly, when you sit and THINK about the whole situation (I mean really mull it over), the whole thing just get's funny and really stupid and you'll wonder why you ever felt so hurt in the first place. People are not glass you can't just break them with one drop.
Half the time when girls that are really into you find out you've cheated on them will be more angry at the other girl anyway. But with their BF's they're willing to at least talk/ cry and get back together.
Regardless in this situation none of it matters because IT IS JUST COLLEGE. If you're taking what should be one of the most exciting times of your life too seriously, then your formula for life should definately be altered.